“…Venlafaxine is also used in TRD as a "next-step" strategy (de Montigny et al, 1999;Kaplan, 2002;Mbaya, 2002;Mitchell et al, 2000;Montes et al, 2004;Nierenberg et al, 1994b;Poirier and Boyer, 1999;Reynaert et al, 2000;Saiz-Ruiz et al, 2002;Schweitzer et al, 2001), and in one large survey of clinicians was reported to be the most popular switch strategy for refractory depression (Kornbluh et al, 2001). There is also anecdotal evidence for the use of venlafaxine as an adjunct in the treatment of resistant depression (Gomez Gomez and Teixido Perramon, 2000), although toxicity may occur when venlafaxine is added to SSRIs since it is a substrate sfor CYP-450-2D6 (Benazzi, 1997), and for the use of venlafaxine as monotherapy in patients with MDD and co-morbid ADHD (Hornig-Rohan and .…”